1 files changed, 371 insertions, 0 deletions

diff --git a/drivers/net/wireless/orinoco/orinoco_plx.c b/drivers/net/wireless/orinoco/orinoco_plx.c
new file mode 100644
index 000000000000..ef761857bb38
--- /dev/null
+++ b/drivers/net/wireless/orinoco/orinoco_plx.c
@@ -0,0 +1,371 @@
+/* orinoco_plx.c
+ *
+ * Driver for Prism II devices which would usually be driven by orinoco_cs,
+ * but are connected to the PCI bus by a PLX9052.
+ *
+ * Current maintainers are:
+ * 	Pavel Roskin <proski AT gnu.org>
+ * and	David Gibson <hermes AT gibson.dropbear.id.au>
+ *
+ * (C) Copyright David Gibson, IBM Corp. 2001-2003.
+ * Copyright (C) 2001 Daniel Barlow
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License
+ * at http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * Alternatively, the contents of this file may be used under the
+ * terms of the GNU General Public License version 2 (the "GPL"), in
+ * which case the provisions of the GPL are applicable instead of the
+ * above.  If you wish to allow the use of your version of this file
+ * only under the terms of the GPL and not to allow others to use your
+ * version of this file under the MPL, indicate your decision by
+ * deleting the provisions above and replace them with the notice and
+ * other provisions required by the GPL.  If you do not delete the
+ * provisions above, a recipient may use your version of this file
+ * under either the MPL or the GPL.
+ *
+ * Here's the general details on how the PLX9052 adapter works:
+ *
+ * - Two PCI I/O address spaces, one 0x80 long which contains the
+ * PLX9052 registers, and one that's 0x40 long mapped to the PCMCIA
+ * slot I/O address space.
+ *
+ * - One PCI memory address space, mapped to the PCMCIA attribute space
+ * (containing the CIS).
+ *
+ * Using the later, you can read through the CIS data to make sure the
+ * card is compatible with the driver. Keep in mind that the PCMCIA
+ * spec specifies the CIS as the lower 8 bits of each word read from
+ * the CIS, so to read the bytes of the CIS, read every other byte
+ * (0,2,4,...). Passing that test, you need to enable the I/O address
+ * space on the PCMCIA card via the PCMCIA COR register. This is the
+ * first byte following the CIS. In my case (which may not have any
+ * relation to what's on the PRISM2 cards), COR was at offset 0x800
+ * within the PCI memory space. Write 0x41 to the COR register to
+ * enable I/O mode and to select level triggered interrupts. To
+ * confirm you actually succeeded, read the COR register back and make
+ * sure it actually got set to 0x41, in case you have an unexpected
+ * card inserted.
+ *
+ * Following that, you can treat the second PCI I/O address space (the
+ * one that's not 0x80 in length) as the PCMCIA I/O space.
+ *
+ * Note that in the Eumitcom's source for their drivers, they register
+ * the interrupt as edge triggered when registering it with the
+ * Windows kernel. I don't recall how to register edge triggered on
+ * Linux (if it can be done at all). But in some experimentation, I
+ * don't see much operational difference between using either
+ * interrupt mode. Don't mess with the interrupt mode in the COR
+ * register though, as the PLX9052 wants level triggers with the way
+ * the serial EEPROM configures it on the WL11000.
+ *
+ * There's some other little quirks related to timing that I bumped
+ * into, but I don't recall right now. Also, there's two variants of
+ * the WL11000 I've seen, revision A1 and T2. These seem to differ
+ * slightly in the timings configured in the wait-state generator in
+ * the PLX9052. There have also been some comments from Eumitcom that
+ * cards shouldn't be hot swapped, apparently due to risk of cooking
+ * the PLX9052. I'm unsure why they believe this, as I can't see
+ * anything in the design that would really cause a problem, except
+ * for crashing drivers not written to expect it. And having developed
+ * drivers for the WL11000, I'd say it's quite tricky to write code
+ * that will successfully deal with a hot unplug. Very odd things
+ * happen on the I/O side of things. But anyway, be warned. Despite
+ * that, I've hot-swapped a number of times during debugging and
+ * driver development for various reasons (stuck WAIT# line after the
+ * radio card's firmware locks up).
+ */
+
+#define DRIVER_NAME "orinoco_plx"
+#define PFX DRIVER_NAME ": "
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <pcmcia/cisreg.h>
+
+#include "orinoco.h"
+#include "orinoco_pci.h"
+
+#define COR_OFFSET	(0x3e0)	/* COR attribute offset of Prism2 PC card */
+#define COR_VALUE	(COR_LEVEL_REQ | COR_FUNC_ENA) /* Enable PC card with interrupt in level trigger */
+#define COR_RESET     (0x80)	/* reset bit in the COR register */
+#define PLX_RESET_TIME	(500)	/* milliseconds */
+
+#define PLX_INTCSR		0x4c /* Interrupt Control & Status Register */
+#define PLX_INTCSR_INTEN	(1<<6) /* Interrupt Enable bit */
+
+/*
+ * Do a soft reset of the card using the Configuration Option Register
+ */
+static int orinoco_plx_cor_reset(struct orinoco_private *priv)
+{
+	hermes_t *hw = &priv->hw;
+	struct orinoco_pci_card *card = priv->card;
+	unsigned long timeout;
+	u16 reg;
+
+	iowrite8(COR_VALUE | COR_RESET, card->attr_io + COR_OFFSET);
+	mdelay(1);
+
+	iowrite8(COR_VALUE, card->attr_io + COR_OFFSET);
+	mdelay(1);
+
+	/* Just in case, wait more until the card is no longer busy */
+	timeout = jiffies + (PLX_RESET_TIME * HZ / 1000);
+	reg = hermes_read_regn(hw, CMD);
+	while (time_before(jiffies, timeout) && (reg & HERMES_CMD_BUSY)) {
+		mdelay(1);
+		reg = hermes_read_regn(hw, CMD);
+	}
+
+	/* Still busy? */
+	if (reg & HERMES_CMD_BUSY) {
+		printk(KERN_ERR PFX "Busy timeout\n");
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+static int orinoco_plx_hw_init(struct orinoco_pci_card *card)
+{
+	int i;
+	u32 csr_reg;
+	static const u8 cis_magic[] = {
+		0x01, 0x03, 0x00, 0x00, 0xff, 0x17, 0x04, 0x67
+	};
+
+	printk(KERN_DEBUG PFX "CIS: ");
+	for (i = 0; i < 16; i++) {
+		printk("%02X:", ioread8(card->attr_io + (i << 1)));
+	}
+	printk("\n");
+
+	/* Verify whether a supported PC card is present */
+	/* FIXME: we probably need to be smarted about this */
+	for (i = 0; i < sizeof(cis_magic); i++) {
+		if (cis_magic[i] != ioread8(card->attr_io + (i << 1))) {
+			printk(KERN_ERR PFX "The CIS value of Prism2 PC "
+			       "card is unexpected\n");
+			return -ENODEV;
+		}
+	}
+
+	/* bjoern: We need to tell the card to enable interrupts, in
+	   case the serial eprom didn't do this already.  See the
+	   PLX9052 data book, p8-1 and 8-24 for reference. */
+	csr_reg = ioread32(card->bridge_io + PLX_INTCSR);
+	if (!(csr_reg & PLX_INTCSR_INTEN)) {
+		csr_reg |= PLX_INTCSR_INTEN;
+		iowrite32(csr_reg, card->bridge_io + PLX_INTCSR);
+		csr_reg = ioread32(card->bridge_io + PLX_INTCSR);
+		if (!(csr_reg & PLX_INTCSR_INTEN)) {
+			printk(KERN_ERR PFX "Cannot enable interrupts\n");
+			return -EIO;
+		}
+	}
+
+	return 0;
+}
+
+static int orinoco_plx_init_one(struct pci_dev *pdev,
+				const struct pci_device_id *ent)
+{
+	int err;
+	struct orinoco_private *priv;
+	struct orinoco_pci_card *card;
+	struct net_device *dev;
+	void __iomem *hermes_io, *attr_io, *bridge_io;
+
+	err = pci_enable_device(pdev);
+	if (err) {
+		printk(KERN_ERR PFX "Cannot enable PCI device\n");
+		return err;
+	}
+
+	err = pci_request_regions(pdev, DRIVER_NAME);
+	if (err) {
+		printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
+		goto fail_resources;
+	}
+
+	bridge_io = pci_iomap(pdev, 1, 0);
+	if (!bridge_io) {
+		printk(KERN_ERR PFX "Cannot map bridge registers\n");
+		err = -EIO;
+		goto fail_map_bridge;
+	}
+
+	attr_io = pci_iomap(pdev, 2, 0);
+	if (!attr_io) {
+		printk(KERN_ERR PFX "Cannot map PCMCIA attributes\n");
+		err = -EIO;
+		goto fail_map_attr;
+	}
+
+	hermes_io = pci_iomap(pdev, 3, 0);
+	if (!hermes_io) {
+		printk(KERN_ERR PFX "Cannot map chipset registers\n");
+		err = -EIO;
+		goto fail_map_hermes;
+	}
+
+	/* Allocate network device */
+	dev = alloc_orinocodev(sizeof(*card), &pdev->dev,
+			       orinoco_plx_cor_reset, NULL);
+	if (!dev) {
+		printk(KERN_ERR PFX "Cannot allocate network device\n");
+		err = -ENOMEM;
+		goto fail_alloc;
+	}
+
+	priv = netdev_priv(dev);
+	card = priv->card;
+	card->bridge_io = bridge_io;
+	card->attr_io = attr_io;
+	SET_NETDEV_DEV(dev, &pdev->dev);
+
+	hermes_struct_init(&priv->hw, hermes_io, HERMES_16BIT_REGSPACING);
+
+	err = request_irq(pdev->irq, orinoco_interrupt, IRQF_SHARED,
+			  dev->name, dev);
+	if (err) {
+		printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
+		err = -EBUSY;
+		goto fail_irq;
+	}
+
+	err = orinoco_plx_hw_init(card);
+	if (err) {
+		printk(KERN_ERR PFX "Hardware initialization failed\n");
+		goto fail;
+	}
+
+	err = orinoco_plx_cor_reset(priv);
+	if (err) {
+		printk(KERN_ERR PFX "Initial reset failed\n");
+		goto fail;
+	}
+
+	err = register_netdev(dev);
+	if (err) {
+		printk(KERN_ERR PFX "Cannot register network device\n");
+		goto fail;
+	}
+
+	pci_set_drvdata(pdev, dev);
+	printk(KERN_DEBUG "%s: " DRIVER_NAME " at %s\n", dev->name,
+	       pci_name(pdev));
+
+	return 0;
+
+ fail:
+	free_irq(pdev->irq, dev);
+
+ fail_irq:
+	pci_set_drvdata(pdev, NULL);
+	free_orinocodev(dev);
+
+ fail_alloc:
+	pci_iounmap(pdev, hermes_io);
+
+ fail_map_hermes:
+	pci_iounmap(pdev, attr_io);
+
+ fail_map_attr:
+	pci_iounmap(pdev, bridge_io);
+
+ fail_map_bridge:
+	pci_release_regions(pdev);
+
+ fail_resources:
+	pci_disable_device(pdev);
+
+	return err;
+}
+
+static void __devexit orinoco_plx_remove_one(struct pci_dev *pdev)
+{
+	struct net_device *dev = pci_get_drvdata(pdev);
+	struct orinoco_private *priv = netdev_priv(dev);
+	struct orinoco_pci_card *card = priv->card;
+
+	unregister_netdev(dev);
+	free_irq(pdev->irq, dev);
+	pci_set_drvdata(pdev, NULL);
+	free_orinocodev(dev);
+	pci_iounmap(pdev, priv->hw.iobase);
+	pci_iounmap(pdev, card->attr_io);
+	pci_iounmap(pdev, card->bridge_io);
+	pci_release_regions(pdev);
+	pci_disable_device(pdev);
+}
+
+static struct pci_device_id orinoco_plx_id_table[] = {
+	{0x111a, 0x1023, PCI_ANY_ID, PCI_ANY_ID,},	/* Siemens SpeedStream SS1023 */
+	{0x1385, 0x4100, PCI_ANY_ID, PCI_ANY_ID,},	/* Netgear MA301 */
+	{0x15e8, 0x0130, PCI_ANY_ID, PCI_ANY_ID,},	/* Correga  - does this work? */
+	{0x1638, 0x1100, PCI_ANY_ID, PCI_ANY_ID,},	/* SMC EZConnect SMC2602W,
+							   Eumitcom PCI WL11000,
+							   Addtron AWA-100 */
+	{0x16ab, 0x1100, PCI_ANY_ID, PCI_ANY_ID,},	/* Global Sun Tech GL24110P */
+	{0x16ab, 0x1101, PCI_ANY_ID, PCI_ANY_ID,},	/* Reported working, but unknown */
+	{0x16ab, 0x1102, PCI_ANY_ID, PCI_ANY_ID,},	/* Linksys WDT11 */
+	{0x16ec, 0x3685, PCI_ANY_ID, PCI_ANY_ID,},	/* USR 2415 */
+	{0xec80, 0xec00, PCI_ANY_ID, PCI_ANY_ID,},	/* Belkin F5D6000 tested by
+							   Brendan W. McAdams <rit AT jacked-in.org> */
+	{0x10b7, 0x7770, PCI_ANY_ID, PCI_ANY_ID,},	/* 3Com AirConnect PCI tested by
+							   Damien Persohn <damien AT persohn.net> */
+	{0,},
+};
+
+MODULE_DEVICE_TABLE(pci, orinoco_plx_id_table);
+
+static struct pci_driver orinoco_plx_driver = {
+	.name		= DRIVER_NAME,
+	.id_table	= orinoco_plx_id_table,
+	.probe		= orinoco_plx_init_one,
+	.remove		= __devexit_p(orinoco_plx_remove_one),
+	.suspend	= orinoco_pci_suspend,
+	.resume		= orinoco_pci_resume,
+};
+
+static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
+	" (Pavel Roskin <proski@gnu.org>,"
+	" David Gibson <hermes@gibson.dropbear.id.au>,"
+	" Daniel Barlow <dan@telent.net>)";
+MODULE_AUTHOR("Daniel Barlow <dan@telent.net>");
+MODULE_DESCRIPTION("Driver for wireless LAN cards using the PLX9052 PCI bridge");
+MODULE_LICENSE("Dual MPL/GPL");
+
+static int __init orinoco_plx_init(void)
+{
+	printk(KERN_DEBUG "%s\n", version);
+	return pci_register_driver(&orinoco_plx_driver);
+}
+
+static void __exit orinoco_plx_exit(void)
+{
+	pci_unregister_driver(&orinoco_plx_driver);
+}
+
+module_init(orinoco_plx_init);
+module_exit(orinoco_plx_exit);
+
+/*
+ * Local variables:
+ *  c-indent-level: 8
+ *  c-basic-offset: 8
+ *  tab-width: 8
+ * End:
+ */